Douglas Scott Kephart

US Patent:

7131974, Nov 7, 2006

Filed:

Oct 14, 2003

Appl. No.:

10/683000

Inventors:

Thomas R. Keyer - Aston PA, US
Roger Berger - Büren, CH
Douglas S. Kephart - Glen Mills PA, US
Martin Walther - Thomery, FR

International Classification:

A61B 17/02

US Classification:

606 96

Abstract:

The present invention is directed to a surgical drill guide. The drill guide may include a first drill guide body having a distal end for placement substantially adjacent a bone, a second drill guide body slidable with respect to the first drill guide body and having a proximal end for contacting a portion of a drill bit, a handle associated with at least one of the first drill guide body and the second drill guide body, and a detent mechanism for releasably retaining the position of the first drill guide body with respect to the second drill guide body in predefined increments. Additionally or alternatively, the drill guide may include a locking member movable between a first position where it substantially prevents sliding of the second drill guide body with respect to the first drill guide body, and a second position where it permits sliding of the second drill guide body with respect to the first drill guide body. The locking member may be resiliently biased to the first position. Other features for improving the drill guide are disclosed and claimed as well.

US Patent:

7476226, Jan 13, 2009

Filed:

Dec 18, 2003

Appl. No.:

10/738033

Inventors:

Stuart Weikel - Drexel Hill PA, US
Nisra Thongpreda - Exton PA, US
Mike Lehmicke - Havertown PA, US
Douglas Kephart - Glen Mills PA, US
Larry Binder - Langhorne PA, US

Assignee:

Synthes (U.S.A.) - West Chester PA

International Classification:

A61B 17/56
A61B 17/58

US Classification:

606 79, 606 83

Abstract:

Tools for use in the creation of cavities in bones. The tools include a probe, a cannula that provides percutaneous passageway to the interior of the treated bone, a bone tamp, and a system for delivering bone filler material into the cavity. The bone tamp has a shaft that is inserted into the bone through the cannula. The end of the shaft that is inserted into the bone may have a flapper tip that extends out of axial alignment with the shaft upon deployment by the physician. Once the tip is deployed, the bone tamp can be rotated to form the cavity. The cavity may then be treated with a medicament, filled with bone filler material, or both. Other tools and materials described herein may be used to lift or restore the treated bone closer to its natural anatomy.

US Patent:

7666189, Feb 23, 2010

Filed:

Sep 29, 2004

Appl. No.:

10/957888

Inventors:

David Gerber - West Chester PA, US
Shaun Hanson - West Chester PA, US
Xiaoping Hu - Oreland PA, US
Douglas Scott Kephart - Glen Mills PA, US
Kyle Kuntz - West Chester PA, US
Andrew Max Lee - Oreland PA, US

Assignee:

Synthes USA, LLC - West Chester PA

International Classification:

A61B 17/58

US Classification:

606104, 606 99, 606 86 A, 81453

Abstract:

A system for performing a less invasive surgical procedure and, in particular, devices and methods for spinal fixation. The system comprises dilation tool(s), at least one working/insertion cannula, a plurality of screws, at least one fixation rod for connecting the screws, and a rod inserter. The dilation tool(s) may be used to dilate an incision made in a patient to form an opening. An insertion cannula may be attached to a screw and inserted into the opening. The screws may be polyaxial screws and may be inserted into the vertebrae using a screwdriver. An operator may then move the insertion cannula to manipulate a head portion of the screws such that the head portions may be aligned to receive a fixation rod. A rod inserter may be used to insert a fixation rod into the head portions.

US Patent:

7722622, May 25, 2010

Filed:

Feb 16, 2006

Appl. No.:

11/354986

Inventors:

David E. Evans - Downingtown PA, US
Douglas S. Kephart - Glen Mills PA, US

Assignee:

Synthes USA, LLC - West Chester PA

International Classification:

A61B 17/60
A61F 2/44

US Classification:

606 99, 606 86 A

Abstract:

An apparatus for use with a spinal implant includes a handle structure with a passage. A shaft with a screw thread that is moveable within the passage in the handle structure. A pusher block is linked to the shaft, and has a forward surface configured to engage the spinal implant. A screw-threaded clutch member is supported on the handle structure for movement into and out of engagement with the screw thread on the shaft.

US Patent:

8308734, Nov 13, 2012

Filed:

Jun 22, 2010

Appl. No.:

12/820846

Inventors:

David E. Evans - Downingtown PA, US
Douglas S. Kephart - Glen Mills PA, US

Assignee:

Synthes USA, LLC - West Chester PA

International Classification:

A61B 17/56
A61B 17/88

US Classification:

606 99, 606 90

Abstract:

An apparatus for use with a spinal implant includes a handle structure with a passage. A shaft with a screw thread is moveable within the passage in the handle structure. A pusher block is linked to the shaft, and has a forward surface configured to engage the spinal implant. A screw-threaded clutch member is supported on the handle structure for movement into and out of engagement with the screw thread on the shaft.

US Patent:

8540770, Sep 24, 2013

Filed:

Sep 4, 2008

Appl. No.:

13/061388

Inventors:

Tom Pepe - Turnersville NJ, US
William McDonough - Collegeville PA, US
Douglas S. Kephart - Glen Mills PA, US
David E. Evans - Downingtown PA, US

Assignee:

Depuy Synthes Products, LLC - Raynham MA

International Classification:

A61F 2/44

US Classification:

623 1711, 623 1715, 623 1716

Abstract:

An adjustable intervertebral implant () for implantation into a patient's spine in-between first and second adjacent or neighboring vertebrae. The implant may include one or more of the following features: (i) inner () and outer () members coupled by a radiographically imageable expansion ring (), (ii) detachable endplates () coupled to the implant via a polygonal press-fit coupling interface that accommodate a range of lordotic endplates to be applied to the implant using any surgical approach, (iii) an interference pre-loaded set screw () for selectively locking the height of the construct, (iv) a radiographically imageable marker () for determining the expansion of the implant, and (v) an asymmetric thread coupling () between the expansion ring and the inner member.

US Patent:

8043344, Oct 25, 2011

Filed:

Apr 30, 2009

Appl. No.:

12/433609

Inventors:

David E. Evans - Downingtown PA, US
Douglas S. Kephart - Glen Mills PA, US

Assignee:

Synthes USA, LLC - West Chester PA

International Classification:

A61B 17/88

US Classification:

606279, 606 99

Abstract:

An apparatus for use with a spinal implant includes a handle structure with a passage. A shaft with a screw thread is moveable within the passage in the handle structure. A pusher block is linked to the shaft, and has a forward surface configured to engage the spinal implant. A screw-threaded clutch member is supported on the handle structure for movement into and out of engagement with the screw thread on the shaft.

US Patent:

20020032447, Mar 14, 2002

Filed:

Aug 28, 2001

Appl. No.:

09/939759

Inventors:

Stuart Weikel - Drexel Hill PA, US
Nisra Thongpreda - Exton PA, US
Mike Lehmicke - Havertown PA, US
Douglas Kephart - Glen Mills PA, US
Larry Binder - Langhorne PA, US

International Classification:

A61F005/00

US Classification:

606/086000

Abstract:

Tools for use in the creation of cavities in bones. The tools include a probe, a cannula that provides percutaneous passageway to the interior of the treated bone, a bone tamp, and a system for delivering bone filler material into the cavity. The bone tamp has a shaft that is inserted into the bone through the cannula. The end of the shaft that is inserted into the bone may have a flapper tip that extends out of axial alignment with the shaft upon deployment by the physician. Once the tip is deployed, the bone tamp can be rotated to form the cavity. The cavity may then be treated with a medicament, filled with bone filler material, or both. Other tools and materials described herein may be used to lift or restore the treated bone closer to its natural anatomy.